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以成都市城市快速路三环路的汽车荷载为研究对象,在道路的东、南、西、北4个方向各全天候不间断地连续测试7 d,采集车辆信息共计122万余辆,信息包括交通流量、轴重、轴距、总重、车速和车牌等。最后以成都市三环路北段的测试数据为基础,根据299 439条汽车荷载信息,统计出成都市三环路的汽车荷载频值谱。依据基于损伤应变的疲劳等效原则和英国BS5400规范的计算方法,以实测的车辆荷载频值谱为基础,制定出符合成都市三环路的汽车疲劳荷载模型。对于其他交通组成相同的道路,该汽车荷载模型可为道路桥梁的疲劳损伤验算提供有价值的参考。
Taking the automobile load of the Third Ring Road of Urban Expressway in Chengdu as the research object, the continuous, continuous test of 7 days in the east, south, west and north of the road was conducted continuously and continuously throughout the day for a total of more than 1.22 million vehicles. The information included Traffic flow, axle load, wheelbase, gross weight, speed and license plates. Finally, based on the test data of the third section of the Third Ring Road in Chengdu, based on the information of 299 439 car loads, the car load frequency spectrum of the Third Ring Road in Chengdu is calculated. Based on the fatigue equivalence principle based on damage and strain and the calculation method of BS5400 in the UK, the fatigue load model of automobile conforming to the Third Ring Road in Chengdu was worked out based on the measured frequency spectrum of vehicle load. For other roads with the same traffic composition, the vehicle load model can provide valuable reference for checking the fatigue damage of road and bridge.